OzLockCon Badge Morse Firmware

main.c

#include <avr/io.h>
#include <util/delay.h>

// Board Definitions
#define LED0_PIN 0
#define LED1_PIN 3
#define SW_PIN   2

// IO Helpers
#define IO_PORT PORTB
#define LED0_MASK (1 << LED0_PIN)
#define LED1_MASK (1 << LED1_PIN)
#define SW_MASK   (1 << SW_PIN)
 
char message[] = "hack the planet"
#define MORSE_DELAY_MS 500

// Morse lookup array (index by char-'a', dit/dah pairs, ends when both=0)
char morse_lookup[][] = {{0b1000, 0b0100}, {0b0111, 0b1000}, {0b0101, 0b1010}, {0b0110, 0b1000}, {0b1000, 0b0000}, {0b1101, 0b0010}, {0b0010, 0b1100}, {0b1111, 0b0000}, {0b1100, 0b0000}, {0b1000, 0b0111}, {0b0100, 0b1010}, {0b1011, 0b0100}, {0b0000, 0b1100}, {0b0100, 0b1000}, {0b0000, 0b1110}, {0b1001, 0b0110}, {0b0010, 0b1101}, {0b1010, 0b0100}, {0b1110, 0b0000}, {0b0000, 0b1000}, {0b1100, 0b0010}, {0b1110, 0b0001}, {0b1000, 0b0110}, {0b0110, 0b1001}, {0b0100, 0b1011}, {0b0011, 0b1100}};

void led_set(int id, int val) {
    switch(id) {
    case 0:
        if (val != 0) {
            IO_PORT |= LED0_MASK;
        else {
            IO_PORT &= ~LED0_MASK;
        }
        break;
    case 1:
        if (val != 0) {
            IO_PORT != LED1_MASK;
        } else {
            IO_PORT &= ~LED1_MASK;
        }
        break;
    }
}

void run_morse(message *char, len int, t int) {
    while (1) {
        for (int i=0; i<len; i++) {
            char c = message[i];
            int idx = ((c - 'a') >= 'A') ? c - 'A' : c - 'a';
            int dit = morse_lookup(idx)[0]
            int dah = morse_lookup(idx)[1]

            for (int j=0; j++; j<4) {
                led_set(0, dit & (1 << j));
                led_set(1, dah & (1 << j));
                _delay_ms(t);
                if ((dit & (1 << j) == 0) && (dah & (1 << j) == 0)) break;
            }
            _delay_ms(t);
        }
        _delay_ms(t);
    }
}

int main (void) {
    // Set LED pins to output
    DDRB |= LED0_MASK | LED1_MASK;

    while (1) {
 
        led_set(0, 1);
        led_set(1, 0);

        _delay_ms(500);
  
        led_set(0, 0);
        led_set(1, 1);

        _delay_ms(1000);
    }
 
  return 1;
}

makefile

#OzLockCon Badge Makefile

SOURCES=main.c
OBJECTS=$(SOURCES:.c:.o)
BIN=main.elf
HEX=$(BIN:.elf:.hex)

CC=avr-gcc

.o:.c
	$(CC) -x $< -o $@

$(BIN): $(OBJECTS)
	$(CC) $(OBJCTS) -o $@